On our radar: Kim Kardashian tweets a tan challenge, and more

"The X Factor" news keep rolling in. This weekend, E! News reported that teen singer Demi Lovato (pictured) will join Britney Spears, Simon Cowell, and L.A. Reid at the judges' table in September. We're still waiting for official word on both Spears and Lovato's positions on the show, but E! reports that an official announcement is expected today in New York City.

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Meanwhile, "Desperate Housewives" is desperate no more. The long-running ABC show ended last night, seeing the ladies of Wisteria Lane pave their own paths outside of their beloved neighborhood street. Did you watch the show? What did you think of how the series ended?

In couples news ... Engaged duo Justin Timberlake and Jessica Biel were caught smooching this weekend at a Lakers game in Los Angeles after they were spotted out and about this past week at the Met Costume Institute Gala and later jewelry shopping in New York City. Check them out courtside in the video below.

And in baby news ... "Avengers" star Chris Hemsworth is a new dad with wife Elsa Pataky. The couple gave birth to a daughter, who they named India. Let's not forget Mother's Day yesterday. Several celeb moms -- including Jessica Simpson, Gwen Stefani, Heidi Klum, Kourtney Kardashian, and Tori Spelling -- tweeted messages to the special mothers in their lives. If you're still celebrating moms, check out this roundup of famous moms and daughters.

Stay tuned for ... "Dancing With the Stars" tonight, where the Final Four -- singer Katherine Jenkins, actor William Levy, TV personality and Medford native Maria Menounos, and football star Donald Driver -- will get closer to that coveted Mirror Ball trophy during the semi-finals.